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Date: Sat, 04 Nov 2023 13:43:47 +0100
From: Linus Walleij <>
To: Hans Ulli Kroll <>, 
 "David S. Miller" <>, Eric Dumazet <>, 
 Jakub Kicinski <>, Paolo Abeni <>, 
 Michał Mirosław <>, 
 Vladimir Oltean <>
Cc:,,, Linus Walleij <>
Subject: [PATCH net 0/4] Fix large frames in the Gemini ethernet driver

This is the result of a bug hunt for a problem with the
RTL8366RB DSA switch leading me wrong all over the place.

I am indebted to Vladimir Oltean who as usual pointed
out where the real problem was, many thanks!

Tryig to actually use big ("jumbo") frames on this
hardware uncovered the real bugs. Then I tested it on
the DSA switch and it indeed fixes the issue.

Signed-off-by: Linus Walleij <>
Linus Walleij (4):
      net: ethernet: cortina: Fix MTU max setting
      net: ethernet: cortina: Fix max RX frame define
      net: ethernet: cortina: Protect against oversized frames
      net: ethernet: cortina: Handle large frames

 drivers/net/ethernet/cortina/gemini.c | 32 ++++++++++++++++++++++++++------
 drivers/net/ethernet/cortina/gemini.h | 10 +++++-----
 2 files changed, 31 insertions(+), 11 deletions(-)
base-commit: 90b0c2b2edd1adff742c621e246562fbefa11b70
change-id: 20231104-gemini-largeframe-fix-c143d2c781b5

Best regards,
Linus Walleij <>

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